@mixin large-text {
    .flex-container {
        display: -webkit-flex;
        display: flex;
        -webkit-flex-direction: column-reverse;
        flex-direction: column-reverse;
        width: 100%;
        background-color: lightgrey;
        flex-item {
            background-color: cornflowerblue;
            width: 200px;
            height: 200px;
            margin: 10px;
        }
    }
}

.flex-container {
    @include prefixer(border-radius, 10px, webkit moz o ms)
}